Steam mop



FIG. 1 is a perspective view of a steam mop in accordance with the present design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing mop handle, mop head and cord hooks are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a steam mop, as shown and described. 